1. Simple machines are useful because they do all the work for you. 3. Machines make our work easier for us by doing the work for us. 4. A simple machine is a machine that helps people with work. 5. A compound machine is two machines put together. An example is a bike. 6. If your pulling a pulley on one side is down force the otherside is up force.
3. Machines make our work easier for us by doing the work for us.
4. A simple machine is a machine that helps people with work.
5. A compound machine is two machines put together. An example is a bike.
6. If your pulling a pulley on one side is down force the otherside is up force.